True environmental impact would be not driving a personal vehicle, either taking public transit or building communities for walking/biking. My concern when I got my hybrid was I would drive more because it was charged off our solar panels - I walked places if it took less than 30 minutes. For a while, I did because I loved driving. I had to recommit to making time to walk as it's warmer than -15°C. Luckily for me that includes the gym, dentist, and a range of shops.
I think Blake is correct.
True environmental impact would be not driving a personal vehicle, either taking public transit or building communities for walking/biking. My concern when I got my hybrid was I would drive more because it was charged off our solar panels - I walked places if it took less than 30 minutes. For a while, I did because I loved driving. I had to recommit to making time to walk as it's warmer than -15°C. Luckily for me that includes the gym, dentist, and a range of shops.